* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.96 2006/09/03 15:59:39 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.97 2006/09/15 16:39:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
*
* The satisfaction of "now" requires the following:
*
- * ((Xmin == my-transaction && changed by the current transaction
- * Cmin != my-command && but not by this command, and
- * (Xmax is null || the row has not been deleted, or
- * (Xmax == my-transaction && it was deleted by the current transaction
- * Cmax != my-command))) but not by this command,
+ * ((Xmin == my-transaction && inserted by the current transaction
+ * Cmin < my-command && before this command, and
+ * (Xmax is null || the row has not been deleted, or
+ * (Xmax == my-transaction && it was deleted by the current transaction
+ * Cmax >= my-command))) but not before this command,
* || or
- *
- * (Xmin is committed && the row was modified by a committed transaction, and
+ * (Xmin is committed && the row was inserted by a committed transaction, and
* (Xmax is null || the row has not been deleted, or
- * (Xmax == my-transaction && the row is being deleted by this command, or
- * Cmax == my-command) ||
- * (Xmax is not committed && the row was deleted by another transaction
- * Xmax != my-transaction)))) that has not been committed
+ * (Xmax == my-transaction && the row is being deleted by this transaction
+ * Cmax >= my-command) || but it's not deleted "yet", or
+ * (Xmax != my-transaction && the row was deleted by another transaction
+ * Xmax is not committed)))) that has not been committed
*
* mao says 17 march 1993: the tests in this routine are correct;
* if you think they're not, you're wrong, and you should think